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# Copyright 2015 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Common code used throughout tests of gRPC."""
import collections
from concurrent import futures
import grpc
import six
INVOCATION_INITIAL_METADATA = (
('0', 'abc'),
('1', 'def'),
('2', 'ghi'),
)
SERVICE_INITIAL_METADATA = (
('3', 'jkl'),
('4', 'mno'),
('5', 'pqr'),
)
SERVICE_TERMINAL_METADATA = (
('6', 'stu'),
('7', 'vwx'),
('8', 'yza'),
)
DETAILS = 'test details'
def metadata_transmitted(original_metadata, transmitted_metadata):
"""Judges whether or not metadata was acceptably transmitted.
gRPC is allowed to insert key-value pairs into the metadata values given by
applications and to reorder key-value pairs with different keys but it is not
allowed to alter existing key-value pairs or to reorder key-value pairs with
the same key.
Args:
original_metadata: A metadata value used in a test of gRPC. An iterable over
iterables of length 2.
transmitted_metadata: A metadata value corresponding to original_metadata
after having been transmitted via gRPC. An iterable over iterables of
length 2.
Returns:
A boolean indicating whether transmitted_metadata accurately reflects
original_metadata after having been transmitted via gRPC.
"""
original = collections.defaultdict(list)
for key, value in original_metadata:
original[key].append(value)
transmitted = collections.defaultdict(list)
for key, value in transmitted_metadata:
transmitted[key].append(value)
for key, values in six.iteritems(original):
transmitted_values = transmitted[key]
transmitted_iterator = iter(transmitted_values)
try:
for value in values:
while True:
transmitted_value = next(transmitted_iterator)
if value == transmitted_value:
break
except StopIteration:
return False
else:
return True
def test_secure_channel(target, channel_credentials, server_host_override):
"""Creates an insecure Channel to a remote host.
Args:
host: The name of the remote host to which to connect.
port: The port of the remote host to which to connect.
channel_credentials: The implementations.ChannelCredentials with which to
connect.
server_host_override: The target name used for SSL host name checking.
Returns:
An implementations.Channel to the remote host through which RPCs may be
conducted.
"""
channel = grpc.secure_channel(target, channel_credentials, ((
'grpc.ssl_target_name_override',
server_host_override,
),))
return channel
def test_server(max_workers=10):
"""Creates an insecure grpc server.
These servers have SO_REUSEPORT disabled to prevent cross-talk.
"""
return grpc.server(
futures.ThreadPoolExecutor(max_workers=max_workers),
options=(('grpc.so_reuseport', 0),))
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